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| author | Michael Liao <michael.liao@intel.com> | 2013-03-26 17:47:11 +0000 |
|---|---|---|
| committer | Michael Liao <michael.liao@intel.com> | 2013-03-26 17:47:11 +0000 |
| commit | 5173ee03af6cbfac8420bd49fad8ed85c2a34763 (patch) | |
| tree | 798a8351ba1a1df99a86e2240537c41f45f4f12c /llvm/lib/Target/X86/X86Subtarget.cpp | |
| parent | bce7c77d852d85ba7fab3bfb60e8bdecdd01763a (diff) | |
| download | bcm5719-llvm-5173ee03af6cbfac8420bd49fad8ed85c2a34763.tar.gz bcm5719-llvm-5173ee03af6cbfac8420bd49fad8ed85c2a34763.zip | |
Add PREFETCHW codegen support
- Add 'PRFCHW' feature defined in AVX2 ISA extension
llvm-svn: 178040
Diffstat (limited to 'llvm/lib/Target/X86/X86Subtarget.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86Subtarget.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86Subtarget.cpp b/llvm/lib/Target/X86/X86Subtarget.cpp index 0f2c008ab96..1a7c2c29eb8 100644 --- a/llvm/lib/Target/X86/X86Subtarget.cpp +++ b/llvm/lib/Target/X86/X86Subtarget.cpp @@ -283,6 +283,10 @@ void X86Subtarget::AutoDetectSubtargetFeatures() { HasLZCNT = true; ToggleFeature(X86::FeatureLZCNT); } + if (IsIntel && ((ECX >> 8) & 0x1)) { + HasPRFCHW = true; + ToggleFeature(X86::FeaturePRFCHW); + } if (IsAMD) { if ((ECX >> 6) & 0x1) { HasSSE4A = true; @@ -440,6 +444,7 @@ void X86Subtarget::initializeEnvironment() { HasBMI2 = false; HasRTM = false; HasADX = false; + HasPRFCHW = false; IsBTMemSlow = false; IsUAMemFast = false; HasVectorUAMem = false; |
